The set of integers is closed under addition, subtraction, and multiplication because when i add, subtract, or multiply any integers, the result is always an integer.
C is the answer to your problem have a good day
You multiply fractions simply by multiplying numerators and denominators with each other:

Answer:
if you go on https://www.geogebra.org/ it will graph it for you
Step-by-step explanation:
X equals twelve divided by seven